Manual Control A simple on-off lighting control circuit illustrates an example of manual control. Manual control requires someone to use a switch to turn something on or off. The device being turned on or off may be a light, as in the previous example. However, many other devices are also controlled manually. For example, a manual starter can be used to start and stop a motor.
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Automatic Operation While manual control of machines is still common practice, many machines are started and stopped automatically or by some combination of manual and automatic control. Automatic control occurs when circuits can turn something on and off without human interaction.
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